Re: Members Who Don't Post
Do you know for sure they are using PMs?
I'm a member of a few boards where I don't post. On some of those I became a member so I could use some of their advanced features which are only for members, such as New Posts, subscriptions, advanced search, etc.
I could also see not posting if someone is more passive or just here for casual purposes. Posting often means there will be some back and forth, and not everyone is looking for that.